Stock-Based Benefit Plans (Details 5) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011	Dec. 20, 2011	Dec. 20, 2010
RSU Expense Recognized
RSU expense recognized	$ 3,367	$ 2,430	$ 12,227	$ 10,147
Non Performance Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units issued			106,970	15,497
Non-Performance Based Restricted Stock Units
Closing price of the Company's common stock on date of issuance					$ 20.50	$ 19.32
Fair value of restricted stock units issued			2,193	299
RSU Expense Recognized
RSU expense recognized	$ 308	$ 39	$ 933	$ 105